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    • circa 1957 (Date attributed to slide)
    • 1927 (Original design)

    Graphic representation of the periodic table of chemical elements consisting of a series table of representative elements with supplementary tabulations for transitional and rare earth elements. These tables were…

    • circa 1957 (Date attributed to slide)
    • 1928 (Original design)

    Graphic representation of the periodic table of chemical elements in the style of a plane spiral-lemniscate for the representative and transitional elements, with an additional loop for the rare earth elements. This…

    • circa 1957 (Date attributed to slide)
    • 1928 (Original design)

    Graphic representation of the periodic table of chemical elements in the style of a spiral with interrupted short and medium periods. This table was originated by French engineer, inventor, and biologist Charles Janet…

    • circa 1957 (Date attributed to slide)
    • 1928 (Original design)

    Graphic representation of the periodic table of chemical elements in the style of a spiral with different sizes of revolutions. This table was originated by French engineer, inventor, and biologist Charles Janet…

    • circa 1957 (Date attributed to slide)
    • 1928 (Original design)

    Graphic representation of the periodic table of chemical elements depicted as a spiral with eight radii. This table was originated by O.I. Stewart in 1928 and classified by chemist Edward G. Mazurs as Type IB2-2 in his…

    • circa 1930

    Two close-up views of a demonstration of the cold-drawing technique used to produce the 3-16 polyester super-silk fiber, the forerunner of nylon. This technique was discovered by DuPont chemist Julian Hill (1904-1996)…

    • circa 1957 (Date attributed to slide)
    • 1931 (Original design)

    Graphic representation of the periodic table of chemical elements in the style of a right-side zigzag. This table was originated by C.H. Douglas Clark in 1931 and classified by chemist Edward G. Mazurs as Type IIIC4-2…

    • 1932 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements designed as a series table with eight groups and three subgroups in which the rare earth elements are placed in two series. This table was originated by…

    • circa 1957 (Date attributed to slide)
    • 1935 (Original design)

    Graphic representation of the periodic table of chemical elements as an Archimedes spiral with a single revolution. This table was originated by Nicolas Opolonick in 1935 and classified by chemist Edward G. Mazurs as…

    • 1935 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements as an Archimedes spiral with a single revolution. This table was originated by Nicolas Opolonick in 1935 and classified by chemist Edward G. Mazurs as…

    • circa 1957 (Date attributed to slide)
    • 1936 (Original design)

    Graphic representation of the periodic table of chemical elements designed as a series table consisting of two parts that are arranged like mirror-images of one another. This table was originated by German chemist Egon…

    • 1937 – 1945 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements constructed as a triangle. This type of table was originated by Henry A. Wagner and Harold Simmons Booth in 1945 after an incomplete drawing by Emil V.…

    • circa 1957 (Date attributed to slide)
    • 1938 (Original design)

    Graphic representation of the periodic table of chemical elements in the style of parallel lines, with the single lines representing subshells and the groups of parallel lines representing different shells. This table…

    • 1941 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements in the style of concentric circles on a plane. This table was originated by L. Sibaiya in 1941 and classified by chemist Edward G. Mazurs as Type IIIB4-3…

    • 1942 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements as a spiral and plane lemniscate. This table was originated by Friedrich Kipp in 1942 and classified by chemist Edward G. Mazurs as Type IIB2-2 in his…

    • circa 1957 (Date attributed to slide)
    • 1943 (Original design)

    Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of space concentric circles in eight planes. This table was originated by G. Haenzel in 1943 and classified…

    • circa 1957 (Date attributed to slide)
    • 1948 (Original design)

    Graphic representation of the periodic table of chemical elements designed as a left-side electronic configuration series table "stretched" in a vertical direction. This table was originated by David T. Gibson in 1948…

    • 1949 (Original design)
    • circa 1957 (Date attributed to slide)

    Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of a helix wound on one cylinder with interrupted short and medium periods. This type of table was originated…

    • circa 1957 (Date attributed to slide)
    • 1949 (Original design)

    Graphic representation of the periodic table of chemical elements designed as a series table with sixteen groups. This table was originated by G.M. Murashov in 1949 and and classified by Mazurs as Type IC3-2a in his…

    • 1953 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements designed as a left-side electronic configuration series table with the alkali metals and nonmetals combined into one block of representative elements.…

    • circa 1957 (Date attributed to slide)
    • 1954 (Original design)

    Graphic representation of the periodic table of chemical elements designed in the style F.M. Shemi︠a︡kin (Fedor Mikhaĭlovich), with additional groups and subgroups. This table was originated by A.I. Mashentsev in 1954…

    • 1955 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. This table was originated by chemist Edward…

    • 1955 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. This table was originated by chemist Edward…

    • circa 1957 (Date attributed to slide)
    • 1955 (Original design)

    Graphic representation of the periodic table of chemical elements designed as a left-step series table with oblique series and Group IIa positioned on the right-hand side of the table. This table was originated by…

    • circa 1957 (Date attributed to slide)
    • 1955 (Original design)

    Partial graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. The section displayed here depicts…